An inverse finite-element algorithm for parameter identification of thermoelastic damage models

✍ Scribed by R. Mahnken

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 251 KB
• Volume: 48
• Category: Article
• ISSN: 0029-5981
• DOI: 10.1002/(sici)1097-0207(20000710)48:7<1015::aid-nme912>3.0.co;2-4

✦ Synopsis

In this contribution an algorithm for parameter identiÿcation of thermoelastic damage models is proposed, in which non-uniform distributions of the state variables such as stresses, strains, damage variables and temperature are taken into account. To this end a least-squares functional consisting of experimental data and simulated data is minimized, whereby the latter are obtained with the ÿnite-element method. In order to improve the e ciency of the minimization process, a gradient-based optimization algorithm is applied, and therefore the corresponding sensitivity analysis for the coupled variational problem is described in a systematic manner. For illustrative purpose, the performance of the algorithm is demonstrated for a non-homogeneous shear problem with thermal loading.